CN112560871B - Prefabricated net shape calibration method - Google Patents
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- CN112560871B CN112560871B CN202011487966.4A CN202011487966A CN112560871B CN 112560871 B CN112560871 B CN 112560871B CN 202011487966 A CN202011487966 A CN 202011487966A CN 112560871 B CN112560871 B CN 112560871B
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- 238000000034 method Methods 0.000 title claims description 25
- 238000013500 data storage Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/24—Aligning, centring, orientation detection or correction of the image
- G06V10/245—Aligning, centring, orientation detection or correction of the image by locating a pattern; Special marks for positioning
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Abstract
The invention discloses a prefabricated net shape auxiliary calibration system, which comprises a data storage device, a control device and a control device, wherein the data storage device is used for storing characteristic information of a prefabricated net; the identification code generating device is used for generating an identification code corresponding to the prefabricated mesh according to the characteristic information of the prefabricated mesh; the auxiliary calibration device comprises a fixing module, an identification module and an image output module, wherein the fixing module comprises three mutually perpendicular flat plates and a clamp arranged on the flat plates and is used for fixing the prefabricated net piece; the identification module is used for scanning the identification code stuck to the prefabricated mesh to identify the prefabricated mesh and retrieving the characteristic information of the prefabricated mesh stored in the data storage device; and the image output module is used for outputting the characteristic information of the prefabricated net sheet, which is called by the identification module, to a flat plate of the fixing module in an image mode. The shape of the prefabricated net sheet can be accurately and rapidly calibrated through the auxiliary calibration system for the shape of the prefabricated net sheet.
Description
Technical Field
The disclosure relates to the technical field of detection equipment, in particular to an auxiliary calibration system and a calibration method for a prefabricated mesh shape.
Background
The technical application of three-dimensional scanning and 3D printing is mature, and accurate presentation can be realized for a plastic stone rockery model in landscape design. In the creative design stage, the building units firstly need to consider necessary building and recreation equipment combined with the rockery, and the requirements of high precision, heavy form and detail display are provided for the modeling of the plastic-stone rockery. Therefore, the prefabricated net piece modeling process of the plastic-stone rockery is generated and is widely applied to large theme park projects at home and abroad. The prefabricated technology of the plastic stone rockery net slice is a manufacturing method which moves the traditional mode of manual modeling on a construction site to a factory, is standardized by the factory and replaces manual random modeling by pipelined production. Although the accuracy of rockery engineering construction can be improved to a certain extent by the net sheet prefabrication process, due to the fact that wires rebound in the bending process, deformation and the like in the welding process and deformation in the carrying process are caused, deviation from a design drawing is caused in the net sheet prefabrication process. Therefore, the shape of the prefabricated mesh needs to be calibrated before the prefabricated mesh performs a "stone molding" operation, and no device and no method for calibrating the shape of the prefabricated mesh exist at present.
Disclosure of Invention
The invention aims to solve the technical problems, and aims to provide an auxiliary calibration system and an auxiliary calibration method for the shape of a prefabricated net sheet, which can quickly and accurately calibrate the prefabricated net sheet.
In order to achieve the above object, the present invention provides a pre-manufactured mesh shape auxiliary calibration system, comprising: the data storage device is used for storing the characteristic information of the prefabricated net sheet; the identification code generating device is used for generating an identification code corresponding to the prefabricated mesh according to the characteristic information of the prefabricated mesh; the auxiliary calibration device comprises a fixing module, an identification module and an image output module, wherein the fixing module comprises three mutually perpendicular flat plates and a clamp arranged on the flat plates and is used for fixing the prefabricated net piece; the identification module is used for scanning the identification code stuck on the prefabricated mesh to identify the prefabricated mesh and retrieving the characteristic information of the prefabricated mesh stored in the data storage device; and the image output module is used for outputting the characteristic information of the prefabricated net sheet, which is called by the identification module, to a flat plate of the fixing module in an image mode.
In order to achieve the above object, the present invention further provides a calibration method for the shape of a prefabricated mesh, the calibration method comprising the steps of:
s1, storing characteristic information of the prefabricated mesh in a data storage device, wherein the characteristic information comprises: numbering and 3D graphics of the prefabricated meshes;
S2, generating an identification code corresponding to the prefabricated net sheet according to at least one of the characteristic information by an identification code generating device, and pasting the identification code on the prefabricated net sheet;
S3, scanning an identification code stuck on the prefabricated mesh through an identification module to identify the prefabricated mesh, and calling characteristic information of the prefabricated mesh stored in a data storage device;
s4, projecting the top view and/or the front view and/or the side view of the 3D graph in the characteristic information acquired by the identification module on a fixed module through an image output module, wherein the ratio of the size of the image to the size of the prefabricated mesh is 1:1, placing the prefabricated mesh on the fixed module, and arranging an auxiliary line between the prefabricated mesh and the image so as to calibrate the prefabricated mesh.
According to the above description and practice, the auxiliary calibration system and the calibration method for the shape of the prefabricated mesh according to the present invention can be used for checking whether the shape of the prefabricated mesh accords with the design drawing by acquiring and storing the characteristic information of the prefabricated mesh, then manufacturing the identification code of the prefabricated mesh, pasting the identification code on the prefabricated mesh, and when calibrating the prefabricated mesh at the construction site, scanning the identification code through the identification module, and then acquiring the characteristic information of the prefabricated mesh, such as a 3D graph, and outputting the top view and/or front view and/or side view images of the 3D graph according to the ratio of 1:1, and setting auxiliary lines between the prefabricated mesh and the images for calibration. The auxiliary calibration system and the calibration method for the shape of the prefabricated net sheet can be used for rapidly and accurately calibrating the prefabricated net sheet, and ensure that the shape of the prefabricated net sheet accords with a design drawing.
Drawings
FIG. 1 is a schematic diagram of a preformed mesh shape-assisted calibration system of the present invention.
Fig. 2 is a schematic structural view of a fixing module according to the present invention.
FIG. 3 is a flow chart of a preformed mesh shape calibration method of the present invention.
Detailed Description
Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. In the present disclosure, the terms "comprising," "including," "having," "disposed in" and "having" are intended to be open-ended and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like, are used merely as labels, and do not limit the number or order of their objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic diagram of a preformed mesh shape-assisted calibration system of the present invention. Fig. 2 is a schematic structural view of a fixing module according to the present invention. Referring to fig. 1 and 2, in the prefabricated mesh shape auxiliary calibration system of the present invention, the auxiliary calibration system includes a data storage device 1, an identification code generating device 2 and an auxiliary calibration device 3, wherein the auxiliary calibration device 3 includes a fixing module 31, an identification module 32 and an image output module 33.
The data storage device 1 is used to store characteristic information of the prefabricated mesh 4, for example, a computer readable storage medium can be used, and can establish a communication connection with other electronic devices and retrieve the information stored therein by the other electronic devices. The characteristic information of the prefabricated mesh 4 includes, but is not limited to, the number of the prefabricated mesh 4 and a 3D graph, wherein the 3D graph can be an image of a 3D model manufactured according to a design drawing of the prefabricated mesh 4, and the 3D graph can display a three-dimensional structure of the prefabricated mesh 4.
The identification code generating device 2 is configured to generate an identification code corresponding to the prefabricated mesh 4 according to the characteristic information of the prefabricated mesh 4, where the identification code generating device 2 may be an electronic computer, and an identification code generating program is stored therein, and is capable of generating an identification code uniquely corresponding to an input parameter, for example, a number of the prefabricated mesh, where the identification code may be a barcode, a two-dimensional code, or other graphic code information. The generated identification code is used for being stuck on the prefabricated net piece 4, so that the characteristic information of the prefabricated net piece 4 can be accurately identified when the prefabricated net piece 4 is calibrated.
The fixing module 31 in the auxiliary calibration device 3 consists in this embodiment of three plates arranged perpendicular to each other, i.e. in the xy-plane, the xz-plane and the yz-plane, respectively, and a clamp (not shown in the figure), preferably with the plates lying in the lower part, i.e. in the xy-plane, lying horizontally, and the prefabricated mesh 2 being fixed by the clamp on the plates. In addition, in this embodiment, the three plates are also used to present a projected image of the preformed mesh 4. As shown in fig. 2, grid lines with fixed intervals are further arranged on the three flat plates, so as to assist in calibrating the prefabricated mesh 2. In this embodiment, three plates are selected for the fixing module 31, and a hollow cube structure is also selected, which can also serve to fix the prefabricated mesh 4 and display the projected image of the prefabricated mesh 4.
The identification module 32 is configured to scan the identification code attached to the prefabricated mesh 4 to identify the prefabricated mesh 4, and retrieve the characteristic information of the prefabricated mesh 4 stored in the data storage device 1. Specifically, the identification module 32 may use an electronic device with a scanning and data processing function, and may scan the identification code and identify the prefabricated mesh 4 corresponding to the identification code, so as to call the characteristic information of the prefabricated mesh 4 in the data storage device 1, for example, by scanning the identification code to obtain the number of the prefabricated mesh 4, and then call the 3D graph of the prefabricated mesh 4 from the data storage device 1 according to the number.
The image output module 33 is configured to output the feature information retrieved by the identification module 32 to the panel of the fixing module 31 in the form of an image. In this embodiment, the image output module 33 employs a projector, which is communicatively connected to the identification module 32 and the data storage device 1, and is capable of projecting a certain view of the 3D image of the prefabricated mesh 4, for example, taken by the identification module 32, onto a certain flat plate of the fixing module 31, and the ratio between the image size of the certain view projected onto the flat plate and the size of the prefabricated mesh 4 is 1:1. The calibration of the prefabricated mesh 4 can be performed by means of an image pattern of this proportion. The projector can be arranged at any position among the three flat plates, and when the images are projected onto different flat plates, the specific positions of the projector are correspondingly adjusted, so that the shielding of the projected images by the prefabricated mesh is reduced, and the display quality of the projected images is improved. That is, the position of the projector in the directions of the x axis, the y axis and the z axis is adjusted so as to reduce the shielding of the prefabricated mesh on the projected image. Alternatively, oblique projection may be employed, but it is necessary to ensure that the final projected image is the same size as the image of the corresponding view of the 3D graphic.
In this embodiment, the projector and the three flat plates are used to display the image of a certain view of the 3D graphics, and the three flat plates may be configured as a screen with a display function, so that the projector is not required to be arranged, and the image of the required view may be displayed on the screen directly.
FIG. 3 is a flow chart of a preformed mesh shape calibration method of the present invention. As shown in fig. 3, when the calibration is performed on the prefabricated mesh by using the auxiliary calibration system for the prefabricated mesh shape, the following steps are performed:
Step S1, storing the characteristic information of the prefabricated mesh 4 in the data storage device 1, wherein the characteristic information includes: numbering and 3D graphics of the prefabricated mesh.
The 3D graph in the characteristic information of the prefabricated mesh 4 is an image of a 3D model which is produced according to a design drawing of the prefabricated mesh, the three-dimensional structure of the prefabricated mesh can be displayed through the 3D graph, and the prefabricated mesh can be calibrated in an auxiliary mode after a certain view in six views is output.
And S2, generating an identification code corresponding to the prefabricated mesh by the identification code generating device 2 according to at least one of the characteristic information, and pasting the identification code on the prefabricated mesh.
In this embodiment, the number of the prefabricated mesh is input to the identification code generating device, and the identification code, for example, the two-dimensional code, uniquely corresponding to the number is generated after processing. Then paste this two-dimensional code after printing on prefabricated net piece 4, can accurately discern the characteristic information of this prefabricated net piece 4 through this two-dimensional code when being convenient for follow-up to it is calibrated. The two-dimensional code is pasted before the prefabricated net piece 4 leaves the factory, and the characteristic information of the prefabricated net piece 4 is identified by scanning the two-dimensional code on a construction site, so that the prefabricated net piece 4 is calibrated.
Step S3, scanning the identification code stuck on the prefabricated mesh 4 by the identification module 32 to identify the prefabricated mesh, and retrieving the characteristic information of the prefabricated mesh 4 stored in the data storage device 1.
In this embodiment, the two-dimensional code attached to the sheet of the prefabricated mesh 4 is scanned by the scanning device in the identification module 32, and after the number of the prefabricated mesh 4 is identified, the 3D pattern of the prefabricated mesh is retrieved in the data storage device 1.
Step S4, projecting the image of the top view and/or the front view and/or the side view of the 3D image in the feature information retrieved by the recognition module 32 on the fixing module 31 through the image output module 33, wherein the ratio of the size of the image to the size of the prefabricated mesh 4 is 1:1, placing the prefabricated mesh 4 on the fixing module, and setting an auxiliary line between the prefabricated mesh 4 and the image to calibrate the prefabricated mesh.
Specifically, in this embodiment, the fixing module is three mutually perpendicular flat plates and a jig provided on the flat plates, and the flat plate located at the lower part is horizontally provided, that is, the three flat plates are respectively on the xy plane, the xz plane and the yz plane, and the xy plane is a horizontal plane.
When the prefabricated mesh is calibrated, firstly, calibrating a top view image, wherein the top view image calibration process comprises the following steps of:
First, a top view image of the 3D pattern of the prefabricated mesh is projected onto a flat plate located on the xy plane by the image output module 33.
Then, the bottom contour of the prefabricated mesh 4 is placed to overlap with the contour of the overhead view image, and a vertical line, such as a heavy hammer line, is set at the detection point of the prefabricated mesh, and the distance between the lower end of the vertical line and the projection of the detection point in the overhead view image is measured. Wherein the detection points may be points of intersection, inflection points, end points, etc. of the unit members constituting the prefabricated mesh 4.
If the distance is smaller than or equal to a preset value, namely, the allowable error range, namely, the x-axis coordinate and the y-axis coordinate of the detection point in a coordinate system formed by the three flat plates meet the requirement of a design drawing, the top view image of the prefabricated mesh is calibrated to be qualified; if the distance is greater than the preset value, the top view image of the prefabricated mesh sheet is not qualified, at this time, the offset of the detection point can be determined according to the grid lines on the flat plate, and the shape of the prefabricated mesh sheet 4 can be corrected according to the offset.
In addition, after the top view calibration of the prefabricated mesh 4 is qualified, front view image calibration and/or side view influence calibration is performed on the prefabricated mesh 4.
The front view image calibration comprises the following steps:
first, the front view image of the current angle of the prefabricated mesh 4 is projected onto the rear panel of the prefabricated mesh 4 through the image output module 33, that is, onto the panel located in the xz plane, and the bottom contour of the front view image is overlapped with the vertical projection of the prefabricated mesh on the rear panel.
And then, setting an auxiliary line perpendicular to the back side flat plate of the prefabricated mesh on the detection point of the prefabricated mesh, for example, measuring the distance between the end part of the auxiliary line and the projection of the detection point in the front view image by adopting a visible laser line.
If the distance is smaller than or equal to a preset value, namely, the allowable error range, namely, the x-axis coordinate and the z-axis coordinate of the detection point in a coordinate system formed by the three flat plates meet the requirement of a design drawing, the front view image of the prefabricated mesh 4 is calibrated to be qualified; if the distance is greater than the preset value, the front view image of the prefabricated mesh 4 is not calibrated properly, at this time, the offset of the detection point can be determined according to the grid line on the flat plate, and the shape of the prefabricated mesh 4 can be corrected according to the offset.
Wherein the side view effect calibration comprises the steps of:
First, a right view image or a left view image of the current angle of the prefabricated mesh 4 is projected on a left side or a right side flat plate of the prefabricated mesh through an image output module 33, and the bottom end contour of the right view image or the left view image is overlapped with the vertical projection of the prefabricated mesh on the left side or the right side flat plate. In this embodiment, a right-view image is employed, which is projected onto a plate lying in the yz plane.
Then, an auxiliary line perpendicular to the left panel of the prefabricated mesh 4 is set at the detection point of the prefabricated mesh 4, for example, a visible laser line can be used to measure the distance between the end of the auxiliary line and the projection of the detection point in the right view image.
If the distance is smaller than or equal to the preset value, namely, the allowable error range, that is, the y-axis coordinate and the z-axis coordinate of the detection point in the coordinate system formed by the three flat plates meet the requirements of the design drawing, the side view image of the prefabricated mesh 4 is calibrated to be qualified. If the distance is greater than the preset value, the side view image of the prefabricated mesh 4 is not calibrated properly, at this time, the offset of the detection point can be determined according to the grid line on the flat plate, and the shape of the prefabricated mesh 4 can be corrected according to the offset.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (3)
1. A method of calibrating the shape of a preformed mesh, the method comprising the steps of:
s1, storing characteristic information of the prefabricated mesh in a data storage device, wherein the characteristic information comprises: numbering and 3D graphics of the prefabricated meshes;
S2, generating an identification code corresponding to the prefabricated net sheet according to at least one of the characteristic information by an identification code generating device, and pasting the identification code on the prefabricated net sheet;
S3, scanning an identification code stuck on the prefabricated mesh through an identification module to identify the prefabricated mesh, and calling characteristic information of the prefabricated mesh stored in a data storage device;
S4, projecting a top view and/or a front view and/or a side view of the 3D graph in the characteristic information acquired by the identification module on a fixed module through an image output module, wherein the fixed module comprises three mutually vertical flat plates and a clamp arranged on the flat plates, the flat plates positioned at the lower part are horizontally arranged, the ratio of the size of the image to the size of the prefabricated mesh is 1:1, the prefabricated mesh is arranged on the fixed module, and auxiliary lines are arranged between the prefabricated mesh and the image to calibrate the prefabricated mesh; wherein the method comprises the steps of
Calibrating the prefabricated mesh comprises calibrating a top view image, wherein the top view image calibration comprises: projecting a top view image of the 3D graph of the prefabricated mesh sheet on a lower flat plate through an image output module; overlapping the bottom outline of the prefabricated mesh with the outline of the overhead view image, and setting vertical lines on detection points of the prefabricated mesh, wherein the detection points are intersection points and/or bending points and/or end points of unit components forming the prefabricated mesh, the vertical lines are heavy hammer lines, and the distance between the lower ends of the vertical lines and the projection of the detection points in the overhead view image is measured; if the distance is smaller than or equal to a preset value, the top view image of the prefabricated mesh is qualified in calibration, and if the distance is larger than the preset value, the top view image of the prefabricated mesh is unqualified in calibration;
after the top view calibration of the prefabricated net piece is qualified, the prefabricated net piece is further subjected to front view image calibration, and the method comprises the following steps: projecting a front view image of the current angle of the prefabricated mesh on a rear side panel of the prefabricated mesh through an image output module, and enabling the bottom outline of the front view image to overlap with the vertical projection of the prefabricated mesh on the rear side panel; an auxiliary line perpendicular to the prefabricated mesh back side flat plate is arranged on the detection point of the prefabricated mesh, a visible laser line is adopted for the auxiliary line perpendicular to the prefabricated mesh back side flat plate, and the distance between the end part of the auxiliary line and the projection of the detection point in the main view image is measured; if the distance is smaller than or equal to a preset value, the front view image of the prefabricated mesh is calibrated to be qualified, and if the distance is larger than the preset value, the front view image of the prefabricated mesh is calibrated to be unqualified.
2. The method of calibrating a shape of a preformed web of claim 1,
After the top view calibration of the prefabricated net piece is qualified, the prefabricated net piece is also subjected to side view image calibration, and the method comprises the following steps:
Projecting a right-view image or a left-view image of the current angle of the prefabricated mesh on a left side or a right side flat plate of the prefabricated mesh through an image output module, and enabling the bottom outline of the right-view image or the left-view image to overlap with the vertical projection of the prefabricated mesh on the left side or the right side flat plate;
an auxiliary line perpendicular to the left side or right side flat plate of the prefabricated mesh is arranged on the detection point of the prefabricated mesh, the auxiliary line perpendicular to the left side or right side flat plate of the prefabricated mesh adopts a visible laser line, and the distance between the end part of the auxiliary line and the projection of the detection point in the right view image or the left view image is measured;
If the distance is smaller than or equal to a preset value, the side view image of the prefabricated mesh is qualified in calibration, and if the distance is larger than the preset value, the side view image of the prefabricated mesh is unqualified in calibration.
3. The method of calibrating a shape of a prefabricated mesh according to claim 1 or 2, wherein the image output module is a projector.
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